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T. R. TURNER AND J. A. NESBITT.

ATTACHMENT FOR HYDROCARBON ENGINES.

APPLICATION man MAY a. 192i.

1,398,406, I Patented Nov. 29, 1921.

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I INVENTORS THOMAS R.TURNR UNITED STATES PATENT OFFICE.

THOMAS ROBERT TURNER, OF TORONTO, AND JAMES ALEXANDER NESBITT, OF LONDON, ONTARIO, CANADA.

ATTACHMENT FOR HYDROCARBON-ENGINES.

Application filed May 6, 1921.

To all whom it may concern:

Be it known that we, THOMAS Ronnlir TURNER, of the cit of Toronto, in the county of York, in the l rovince of Ontario, and James ALEXANDER Nnsnrrr, of the city of London, in the county of Middlesex, in the Province of Ontario, Canada, both subjects of the King of Great Britain, have invented certain new and useful Improvements in Attachments for Hydrocarbon Engines, of which the following is the specification.

Our invention relates to improvements in attachments for hydro-carbon engines and the object of the invention is to devise means operated by the piston suction for utilizing the heated air in the crank case, by drawing such air into the inlet manifold, to enrich the mixture passing through the inlet manifold to the inlet ports and at the same time for improving the lubrication by drawing oil, which is held suspended in the form of vapor in the air of the crank case, into the cylinders of the engine and it consists essen tially of the arrangement and construction of parts as hereinafter more particularly explained.

Figure l is a side elevation of a hydrocarbon engine showing our device applied thereto.

Fig. 2 is an enlarged sectional detail on line 22 Fig. 1.

Fig. 3 is an enlarged sectional detail through the spring pressed valve employed in connection with our device.

Fig. 4 is an end of the valve as shown in Fig. 3 and looking in the direction of arrow.

Fig. 5 is an enlarged sectional detail of the tubular member 15.

In the drawings like characters of reference indicate corresponding parts in each figure.

1 indicates the body of the engine, 2 the crank case, 8 the breather tube, 4 the carbureter, and 5 the inlet manifold leading from the carbureter and constructed in the usual manner, so as to lead to the inlet ports of the engine. 6 is the exhaust manifold. 7 is a tube, the upper end of which is provided with an enlargement 8 forming a T-end which is located in proximity to the exhaust manifold so that the air passing therethrough is heated by reason of its close proximity to the exhaust manifold. The lower end of the tube at 9 is turned in a horizontal Specification of Letters Patent.

Patented Nov. 29, 1921.

Serial No. 467,418.

direction. 12 is a valve casing which is cylindrical in form and provided at its opposite walls with flanged openings 11 and 12*. The horizontally turned end 9 of the tube 7 is secured to the flange of the opening 11 and the flange of the opening 12* is connected to the carbureter laround the inlet opening thereof. 13 is a peripheral opening formed in the casing 10 and from which leads a small pipe 1%. Such pipe extends upwardly for a short distance and is then bent horizontally so as to pass to the outside of the inlet manifold 5. The opposite end of the pipe 14 is connected to a tubular member 15 which fits into the opening of the breather 3 and is provided at its upper end with a spring held cap or closure 16. 17 is a fine tube which is connected at one end to the pipe 1% so as to communicate therewith and extends at its opposite end through the wall of the inlet manifold 5. 18 is a controlling cock which is interposed in the fine tube 17 so as to control the passage of air therethrough. 19 is a controlling handle by which the plug of the cock 18 is turned. Referring to the valve casing 10, 20 is a bridge which extends across the opening 12 and is provided centrally with an enlargement having a bearing orifice 21. The opening 11 of the casing 10 is provided with an interior valve seat 22. 23 is a valve head co-acting with the seat 22 and 24 is a valve stem formed integral with the valve head 23 and extending through the bearing orifice 21. 25 is a compression spring interposed between the head 23 and the bridge 20.

Having described the principal parts involved in our invention, we will briefly describe the operation of the same.

During the operation of the engine and the downward stroke of the pistons thereof, a vacuum is formed in the upper portion of the cylinder to draw in the charge from the carbureter in the usual manner. When it is desired to enrich the mixture the handle 19 is turned to open the cock 18 thereby permitting air to be drawn from the crank case 2 through the breather 3, tubular member 15, pipe 14 and fine tube 17 into the inlet manifold to combine with the mixture passing therethrough from the carbureter to the inlet ports of the engine. In order to maintain a vacuum to produce this op eration we have provided a closing valve contained in the casing 10. Under ordinary conditions, where the parts of the engine do not fit to form perfectly air tight oints, the engine works perfectly free but where the parts of the engine fit tight so as to prevent any leakage of air the vacuum would be so strong as to retard the engine and prevent its easy operation. When this takes place the vacuum draws the valve head 23 off its seat 22 against the pressure of the spring 25 allowing the air to pass from the atmosphere through the tube 7 into the carbureter and through the tube let thereby freeing the engine.

From this description it will be seen that we have devised a very simple device whereby heated air is drawn directly from the crank case to produce a richer mixture and at the same time improves the lubrication of the engine cylinders and under ordinary conditions when the throttle valve of the carbureter is partially closed when running slow a vacuum is formed retarding the action of the engine. Under these conditions the valve 18 is opened so that the air is drawn directly into the manifold, enriching the mixture, increasing the power and enabling the engine to run smoothly and freely. What we claim as our invention is:

1. In a hydro-carbon engine, the combination with the crank case having a breather port, inlet manifold, and carbureter, of an air supply tube leading to the carbureter, a pipe connected at one end of the air supply tube and to the breather port at the opposite end, a suction valve for controlling the passage of air through the pipe, a tube connecting the pipe with the inlet manifold, and manual means for controlling the passage of air from the pipe through the tube into the inlet manifold.

2. In a hydro-carbon engine, the combination with the crank case having a breather port, inlet manifold and carbureter, of an air supply tube leading to the carbureter, a tubular member fitting within the breather port and having a closure at its upper end, a pipe connecting the air inlet tube with the tubular member, a suction valve located in the air supply tube and adapted to control the passage of air through the pipe, a'small tube connecting the pipe with the inlet manifold, and a controlling cock interposed in the length of the tube, and a controlling handle therefor.

33. In a hydro-carbon engine, the combination with the crank case having a breather port, inlet manifold and carbureter, of a tubular member fitting within the breather port and having a closure at its upper end, a valve casing secured to the air inlet of the manifold, a suction valve contained therein, a pipe leading from the casing to the tubular member, a tube connecting the pipe with the inlet manifold, and a manually operated valve for controlling the passage of air through the tube into the manifold.

&. In a hydro-carbon engine, the combination with the crank case having a breather port, inlet manifold and carbureter, of an air supply tube leading to the carbureter, a pipe connected at one end to the air supply tube and to the breather port at the opposite end, a suction valve for controlling the passage of air through the pipe.

THOMAS ROBERT TURNER. JAMES ALEXANDER NESBITT. 

